adjective
- relating to or occurring in the ocean depths between about 200 and 4000 meters, where sunlight does not penetrate
Usage: oceanography; marine biology
Examples
- The bathyal zone is home to many deep-sea creatures.
- Scientists study bathyal sediments to understand ocean history.
- Bathyal waters remain cold and dark throughout the year.
- The research vessel collected samples from the bathyal depths.
- Many fish species migrate between bathyal and shallower waters.
- Bathyal environments support unique ecosystems adapted to high pressure.